Abstract
A 3D Eulerian-Lagrangian model using MP-PIC method is developed to study the co-combustion of pulverized coal and biomass in a TTF precalciner. The results show that there are three spraying effects and five recirculation zones formed near the raw meal inlet in the precalciner. The highest temperature can reach up to 1600 K in the main combustion zone and the decomposition rate of raw meal can reach 93.9 % with no biomass input. In addition, with the increase of biomass blending ratio, the average temperature, the decomposition rate of raw meal and NOx emissions in the precalciner show a downward trend. When the biomass input is 40 %, the concentration of NO at the outlet decreased to 302 ppm. However, on the premise of ensuring that the decomposition rate of cement raw meal is not less than 85 %, the biomass blending ratio of 30 % may be the best choice.
Published Version
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